• 환경영향평가
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• 제20권1호
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• pp.49-59
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• 2011

The results of comparing $PM_{10}$ concentration between 'Namsan' and 'Yongsan-gu' air quality monitoring stations show similar values with averaged concentration in the whole Seoul. The correlation factors in both sites were 0.865, 0.828 in 2005, 2006, respectively. For 'Bukhansan' and 'Gangbuk-gu' air quality monitoring stations, different from the results mentioned above, they showed clear differences as altitude changes. PM10 concentration in 'Bukhansan' monitoring stations was 10 ${\mu}g/m^3$ lower than 'Gangbuk-gu' monitoring station which is located near the ground. Also, averaged PM10 concentration in 'Bukhansan' and 'Gangbuk-gu' monitoring stations was lower than that in the whole Seoul. When comparing $NO_2$ concentration between 'Namsan' and 'Yongsan-gu' monitoring stations, $NO_2$ concentration in 'Namsan' monitoring station was lower than 'Yongsan-gu' monitoring station. For $NO_2$ concentration in 'Bukhansan', 'Gangbuk-gu' and 'the whole Seoul', there were the same pattern in 'Gangbuk-gu' and the 'the whole Seoul' and low values in 'Bukhansan' monitoring station. The correlation factors of $NO_2$ concentration in 'Bukhansan' and 'Gangbukgu' was 0.525, 0.549 in 2005, 2006, respectively, which stands for low correlationship.

• 한국콘텐츠학회논문지
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• 제20권8호
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• pp.547-558
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• 2020

본 연구는 푸드뱅크 이용자의 만족도를 서비스 만족도, 음식만족도, 시설·환경 만족도로 구분하고 영향요인을 다중회귀분석을 통해서 도출하여 서비스 질 개선을 위한 방안을 제시하고자 하였다. 주요연구결과는 다음과 같다. 먼저, 서비스만족도는 통계적으로 유의미한 결과를 찾아볼 수 없었다. 둘째, 음식만족도의 경우 지원 빈도가 낮을수록, 조리된 음식의 경우 만족도가 높게 나타났는데 이는 음식제공 빈도보다는 조리된 음식을 통해 결식문제를 적절하게 해소하는 것이 이용자에게 중요하다는 해석이 가능하다. 셋째, 시설환경만족도와 관련하여, 학력이 높을수록, 월 소득이 낮을수록, 지원 후 식비지출액이 높을수록 만족도가 높은 것으로 나타났다. 학력이 높은 이용자는 정보안내, 서비스 제공시간대, 시설 및 환경의 위생을 중요하게 생각하며, 월소득이 낮고 지원 받은 후에도 식비지출액이 높은 이용자들은 결식문제 해소를 위해 푸드뱅크 서비스가 절실함을 유추해 볼 수 있다. 이러한 연구결과를 바탕으로 서비스 이용자의 여건을 고려하여 결식문제가 효과적으로 해소될 수 있도록 이용자 중심의 서비스로 발전되어야 할 필요성이 있음을 강조하였다.

• Asian Pacific Journal of Cancer Prevention
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• 제16권2호
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• pp.613-619
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• 2015

Background: Hepatocellular carcinoma (HCC) is the commonest primary malignant cancer of the liver in the world. Insulin-like growth factor-1 (IGF-1) levels reflect hepatic function and are inversely correlated with the severity of background chronic liver disease. Objective: This study evaluated whether basal serum IGF-1 levels can predict prognosis of HCC patients according to different risks of disease progression. Materials and Methods: A total of 89 patients with hepatocellular carcinoma (HCC) were recruited in 3 groups: Group I, 30 HCC patients receiving sorafinib; Group II, 30 HCC patients with best supportive care; and Group III include 29 patients undergoing transcatheter arterial chemoembolization (TACE). All patients were investigated for serum levels of AST, ALP, Bb, Cr, BUN, AFP and IGF-I. Results: Patients with disease control had significantly higher baseline IGF-1 levels 210 (185-232.5) ng/mL (p value<0.01) than did patients without disease control. Low basal IGF-1 levels were associated with advanced HCC, such as multiple tumors and advanced stage, and low IGF-1 levels predicted shorter TTP and overall survival in patients treated with TACE. Conclusions: The levels of serum IGF-1, expressed as continuous values, may be helpful for accurately assessing hepatic function and the prognostic stratification of patients with HCC.

• 방송공학회논문지
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• 제20권3호
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• pp.414-420
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• 2015

3차원 영상 시스템에서 깊이 영상은 3차원 콘텐츠를 표현하는데 있어 매우 중요한 역할을 수행한다. 그러나 깊이 카메라로부터 얻은 원본 깊이 영상은 해상도가 색상 영상에 비해 매우 작고 시간적 흐름의 측면에서 관찰하였을 때 깊이 값이 불안정하게 진동하는 깜빡임 문제가 발생한다. 이 문제는 시청자들이 3차원 콘텐츠를 감상할 때 불편한 느낌을 초래한다. 이 논문에서는 원본 깊이 영상의 저해상도 문제를 해결하기 위해 3차원 워핑과 깊이 가중치가 추가된 결합형 양방향 업샘플링 방법을 사용한다. 다음으로 깊이 영상의 배경 영역에서 발생하는 깜빡임 문제를 해결하기 위해 전경과 배경을 분리한 뒤, 전경 영역에는 업샘플링된 깊이 영상을 사용하고 배경 영역에는 시간적 평균값 필터 영상을 이용했다. 실험결과는 제안하는 방법이 시간적 일관성이 향상된 고해상도의 깊이 영상을 생성함을 보였다.

• Asian Pacific Journal of Cancer Prevention
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• 제16권9호
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• pp.4031-4035
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• 2015

Background: Breast cancer is one of the most feared diseases among women and it could induce the development of psychological disorders like anxiety and depression. An assessment was here performed of the status and to determine contributory factors. Materials and Methods: A cross-sectional study was conducted among breast cancer patients at University Kebangsaan Malaysia Medical Center (UKMMC), Kuala Lumpur. A total of 205 patients who were diagnosed between 2007 until 2010 were interviewed using the questionnaires of Hospital Anxiety and Depression (HADS). The associated factors investigated concerned socio-demographics, socio economic background and the cancer status. Descriptive analysis, chi-squared tests and logistic regression were used for the statistical test analysis. Results: The prevalence of anxiety was 31.7% (n=65) and of depression was 22.0% (n=45) among the breast cancer patients. Age group (p= 0.032), monthly income (p=0.015) and number of visits per month (p=0.007) were significantly associated with anxiety. For depression, marital status (p=0.012), accompanying person (p=0.041), financial support (p-0.007) and felt burden (p=0.038) were significantly associated. In binary logistic regression, those in the younger age group were low monthly income were 2 times more likely to be associated with anxiety. Having less financial support and being single were 3 and 4 times more likely to be associated with depression. Conclusions: In management of breast cancer patients, more care or support should be given to the young and low socio economic status as they are at high risk of anxiety and depression.

• 천문학회지
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• 제46권2호
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• pp.75-91
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• 2013

We estimate the power spectra of the cosmic microwave background radiation (CMB) temperature anisotropy in localized regions of the sky using the Wilkinson Microwave Anisotropy Probe (WMAP) 7-year data. We find that the north and south hat regions at high Galactic latitude ($|b|{\geq}30^{\circ}C$) show an anomaly in the power spectrum amplitude around the third peak, which is statistically significant up to 3. We try to explain the cause of the observed anomaly by analyzing the low Galactic latitude ($|b|$ < $30^{\circ}C$) regions where the galaxy contamination is expected to be stronger, and the regions weakly or strongly dominated byWMAP instrument noise. We also consider the possible effect of unresolved radio point sources. We find another but less statistically significant anomaly in the low Galactic latitude north and south regions whose behavior is opposite to the one at high latitude. Our analysis shows that the observed north-south anomaly at high latitude becomes weaker on regions with high number of observations (weak instrument noise), suggesting that the anomaly is significant at sky regions that are dominated by the WMAP instrument noise. We have checked that the observed north-south anomaly has weak dependences on the bin-width used in the power spectrum estimation, and on the Galactic latitude cut. We also discuss the possibility that the detected anomaly may hinge on the particular choice of the multipole bin around the third peak. We anticipate that the issue of whether or not the anomaly is intrinsic one or due to WMAP instrument noise will be resolved by the forthcoming Planck data.

• Asian Pacific Journal of Cancer Prevention
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• 제16권12호
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• pp.5119-5124
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• 2015

Background: HPV vaccination in Singapore is voluntary and physician prescription-based. This study investigated the current status and intention for HPV vaccination among Singapore nurses. Materials and Methods: All female nurses in a general hospital were given an anonymous questionnaire on HPV vaccination experience and intention of vaccinating their daughters. The influence of age, knowledge and perceived-risk of cervical cancer, and cultural background on mother's intention of vaccinating their daughters was analyzed. Results: Of 2,000 nurses, 1,622 (81.1%) responded and analysis was performed on 1,611 with valid data. They showed good awareness on association of cervical cancer with multiple sexual partners (81.9%), history of sexually transmissible diseases (78.2%), and history of genital warts/HPV infection (73.5%), and on cervical cancer preventive effects of HPV vaccination (54.6%). The prevailing misconceptions of the vaccines were: investigational nature (38.9%), side effects (27.9%) and indicated for women at high risk for cervical cancer (20.5%). Conclusions: Misconceptions on the nature, role and safety of HPV vaccines low vaccine up-take rates and daughters. Dissemination of adequate and accurate HPV vaccine information and a review for school-based vaccination are needed for optimal delivery of HPV vaccines in Singapore.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2010년도 제39회 하계학술대회 초록집
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• pp.208-208
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• 2010

Zinc oxide (ZnO) is a functional material with interesting optical and electrical properties, a wide band gap (more than 3.3 eV), a high transmittance in the visible light region, piezoelectric properties, and a high n-type conductivity. This material has been investigated for use in many applications, such as transparent electrodes, blue light-emitting diodes, and ultra-violet detector. ZnO films grown under low oxygen pressure by thin film deposition methods show low resistivity and large free electron concentration. Therefore, reducing the background carrier concentration in ZnO films is one of the major challenges ahead of realizing high-performance ZnO-based optoelectronic devices. In this study, we deposited ZnO thin films on sapphire substrates by pulsed laser deposition (PLD) with employing an oxygen plasma source to decrease the background free-electron concentration and enhance the crystalline quality. Then, the substrate temperature was varied between 200 'C to 900 'C The vacuum chamber was initially evacuated to a pressure of $10^{-6}$ Torr, and then a pure $O_2$ gas was introduced into the chamber and the pressure during deposition was maintained at $10^{-2}$ Torr. Crystallinity and orientation of ZnO films were investigated by X-ray diffraction (XRD). The film surface was analyzed with atomic force microscope (AFM). And electrical properties were measured at room temperature by Hall measurement.

• 음성과학
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• 제13권2호
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• pp.133-145
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• 2006

In order to understand the various groups' perceptual pattern in both VCV trochee and iambus, this study examined the identification correctness and cue robustness for the unit intervals in light of background language, age, and English listening ability. The 4 groups of Native Speakers of English, Korean College Students of High Listening Achievement, Korean College Students of Low Listening Achievement, and Korean Elementary Students took part in the experiments. Tokens of $/d{\ae}per,\;d{\ae}per,\;d{\ae}per,\;d{\ae}per,\;d{\ae}per,\;d{\ae}per$ in trochee and of $/{\eth}{\partial}\;p{\ae}d,\;{\eth}{\partial}\;b{\ae}d,\;{\eth}{\partial}\;t{\ae}d,\;{\eth}{\partial}\;d{\ae}d,\;{\eth}{\partial}\;k{\ae}d,\;{\eth}{\partial}\;g{\ae}d/$ in iambus were extracted and modified into experimental signals composed of two digits(voiced-1, voiceless-0) by following the temporal intervals, in which the signals consisted of preceding vowel, closure, VOT, and post-vowel. In the first experiment of identification correctness in VCV iambus environment, all groups showed almost 100% correctness rate, while in trochee environment all groups were different(native speaker 87%, college high 74%, college low 70%, elementary 65%). In the second experiment of cue robustness, all groups showed the similar perceptual pattern in both environments. There was the order of robustness cues in VCV trochee: pre-vowel ${\gg}$ closure ${\gg}$ VOT ${\gg}$ post-vowel, while the order in VCV iambus: VOT ${\gg}$ post-vowel ${\gg}$ closure ${\gg}$ pre-vowel. In some condition, however, we found moderately different perceptual pattern depending on language, age and listening level.

• 한국환경복원기술학회지
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• 제11권3호
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• pp.39-49
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• 2008

A study was carried out on the physico-chemical properties of soil and content of heavy metals and benzo(a)pyrene that might have been introduced through by-product fertilizers or air pollution to growing turfgrass at natural turfgrass playgrounds in elementary schools located at the western coast and eastern mountain areas in Jeollabuk-do, Korea. The soil of turfgrass playgrounds is composed of loamy sand, and the CEC and organic matters were very low. Compared to agricultural land in Korea, the concentrations of nitrogen, phosphorus and potassium were very low, requiring control in terms of nutrients. The contents of total and fraction heavy metals in soil were found to be background level. The reason may lie in the fact that unpolluted sand soil or sand was used to construct the foundation for the natural grass playground in the first place. However, any change in oxidation-reduction conditions or acceleration of decomposition of organic compounds may release some heavy metals from the soil and be transformed into forms that may be easily absorbed by plants or grass. It is believed that sustained monitoring and environment impact assessments should be carried out. The contents of benzo(a)pyrene in soil showed an average 0.60ng/g with a range between 0.06 to 1.47ng/g. The detected contents were found as background level.